ABC News(LANCASTER, Pa.) -- Goats on a Pennsylvania farm are drawing attention because of a special trait -- they faint.

When startled, the goats’ muscles freeze, causing them to collapse, stiff as a board.

Carol Ellis, who owns Goat Flower Farm in Lancaster, has been breeding the “fainting goats” -- officially known as Myotonic goats -- for almost 20 years, she told ABC affiliate WHTM. The fainting is due to a genetic disorder.

“It doesn’t hurt them at all. It’s completely muscular. It doesn’t affect any other system,” she said.

Video of the goats tipping over is popular online, drawing interest from worldwide TV crews. Buyers across the East Coast are also intrigued by the goats, Ellis said.

“People like to have the fainting goats, and they get treated like dogs or cats,” she told WHTM. “We just fell in love with them. They are the perfect goat in our eyes.”